SOUTHWESTERN BELL
128 prefixes in 573 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 573-754 | LOUISIANA | 9533 | — | Yes |
| 573-755 | JACKSON | 9533 | 2010-11-11 | Yes |
| 573-756 | FARMINGTON | 9533 | — | — |
| 573-757 | DEERING | 9533 | — | Yes |
| 573-760 | FARMINGTON | 9533 | — | Yes |
| 573-776 | POPLAR BLF | 9533 | — | Yes |
| 573-778 | POPLAR BLF | 9533 | — | Yes |
| 573-783 | FREDERCKTN | 9533 | 2001-05-01 | Yes |
| 573-784 | FRANKFORD | 9533 | — | Yes |
| 573-785 | POPLAR BLF | 9533 | — | — |
| 573-788 | OLDAPPLETN | 9533 | — | Yes |
| 573-792 | HOLCOMB | 9533 | — | Yes |
| 573-794 | DELTA | 9533 | — | Yes |
| 573-824 | ALTEBGFRHN | 9533 | — | Yes |
| 573-833 | POCAHONTAS | 9533 | — | Yes |
| 573-840 | POPLAR BLF | 9533 | — | Yes |
| 573-847 | PAYNESVL | 9533 | — | Yes |
| 573-866 | PATTON | 9533 | — | Yes |
| 573-873 | CAMDENTON | 9533 | — | Yes |
| 573-878 | BEAUFORT | 9533 | 2006-03-28 | Yes |
| 573-883 | STEGNVIEVE | 9533 | — | Yes |
| 573-887 | CHAFFEE | 9533 | — | Yes |
| 573-888 | KENNETT | 9533 | — | Yes |
| 573-897 | LINN | 9533 | — | Yes |
| 573-898 | ELSBERRY | 9533 | — | Yes |
| 573-964 | LKOZKOSBCH | 9533 | — | Yes |
| 573-967 | FISK | 9533 | — | Yes |
| 573-986 | CAPEGIRARD | 9533 | — | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.